Features:- Choose from one of four characters - Sonic, Tails, Knuckles, or the new character Cream, each with their own signature moves.- New environments ranging from space age metal labyrinths to an incredible music masterpiece, each with multiple paths to explore!- Link up Game Boy Advance systems using the Game Link Cable and experience the action with up to four people.- Connect your Game Boy Advance to your Nintendo GameCube and visit the new Chao Garden - raise Chaos and watch them compete in the Super High Jump!